# Math Help - Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x

1. ## Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x

Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x

2. Originally Posted by -DQ-
Find d/dx integral -1 to x of f(t)dt if f(x)=4-3x
use the first fundamental theorem of calculus

3. i tried, and failed

isnt x to any constant equal to dy/dx

is d/dx the same as dy/dx making it 4-3x

4. Originally Posted by -DQ-
i tried, and failed

6. Where? The only thing I see is
isnt x to any constant equal to dy/dx

is d/dx the same as dy/dx making it 4-3x
Two questions, no work.

The first suggestion was that you use the "fundamental theorem of calculus". You said "I tried and failed". HOW did you try? What answer would the fundamental theorem give you?

7. woudn't it just be (4-3x)(1) yielding 4-3x since it's going from a constant to x.

that is my work..